Drilling apparatus.



G. H. GILMAN.. DRILLINGAPPARATUS. APPLICATION mm IULY 19 "I155 Patented Sept. 24; 1918.

l mvenior Georgefl. air/mm by .Qnwiu To all whom; it mayyaoncam:

UNITED STATES PATENT OFFICE.

enonn 11.; GILMAN, or cnisnnmonm, NEW numzsninn, sssmnon T SULLIVAN xncnnznnr mummy, or BOSTON, mussscnnsnrrs, A. com-cannon or mucnnsmrs.

DRILLING APPARATUS.

Bcit known that I, Gnonon H. GILMAN, a citiZcn f.athciUnited Staten, and a resident of Qldrcmont, county ofSullivan, and State of New Htx npshirc, liujvei'nvontcd an Initprovcmcnt in Drilling, Apparatus, of which thc following dsonption, in conncotion with the accompanying druwings, is a specifioa tion, likccharacters on the drawings representing'likc parts. v

This invention relates to drilling apparatus, and is more. particularly though not exclusively conccrnod with. a pressure fluid actuated drilling tool, having pressure fluid feeding .m runs for advancing the. 01 to- 1o iii'lt in i, 551%?! My invcntio lf'cicrcncc to thc following specification when taken in connection with thc'nccompanying drawings of one illustrntivc embodiment thereof, Whilc its sxzopc will loo more; particularly pointed out in this :tppcndcd claims.

Figure 1 is u. siclc clcvution, partly broken Emily and partly in suction, of n drilliitig up purutus cmbodying my inrcntiong Fig; 2 is a control, vertical, longitudinal section, partlyiin clovutiou, of the drilling on inc; and

wig 3 is arcrt icul cross scction on the line 3 3 of Fig. '1.

Referring to the drawings which show oncill ustrutivs cmbodmcnt of my invcn d; lling apparatus huvins Wli n or purpo cs dcsc'rilicd in connection with my .copcnding applicutiomfisrial No. 21,435, filed April Ti t; 1915. Cooperating Witil tho-drilling en I gins l I orcfcr to drill step]. 2 and a The drilling engine.

drill stcc rctuinor 3. umy attached by any sintablc clamp t, and

preferably through an offset member 55,40

the fccd mcchunism. The food inccl'mnisni may comprise ui nston 6" having it piston clamp '8. Pressurc fiuiductuutml relative movement of the piston-rod 6 and tho cylinden 7 will result in simils'r niovcmcntof the drilling snglnc and drill'blt relative to the willli'o nest undcrstoorl by Specification of Letters Patent. ,P ttented Sept. 24, 1918. Application llledluly 19, 1915* Serial No. 40,571 Q Work. The control pressure fluid to on;

drill and to the feeding mechanism is preferably performed by valve mechanism 9 similar to that illustratcd and described in the aforesaid. copcnding application 21,435,

filed April 1 3.915.

I preferably use drill bit rotating mechanism which may include the ratchet mccham'srn 10 and is preferably the some or similar to that which forms th'c' subject matter of United States Letters Patent No. 1,034,010, granted to Sullivan Machinery Company,

'uly 30, 19.12, as my assigncc.

It is of marked adiantugc to rotate the drill steel, preferably automuticall during the drilling opciution. The use 0 pressure 'i'iuid funding mechanism in connctlon With such rotutionlnuy result in such pressure on the point of the drill. steel that rotation of tho drill Staci may be unduly retarded or even stopped; To prevent this I have found it advantageous to provide means for regulating the force, exerted by the feed mechanism on the drill point, Whilc this may be done in a variety of Ways without departing from the spirit and scopc of my invention, it may take; the town of restraining means which, without reducing the power or prossum of the fcoding mechanism, does reduce the zunount of pressure cxcrte on the drill point, It is highly dcsimblc'tlmt such restraining moans be adjustable so that there straint may be "varied, 'according to the nu turn of fin: nlutcrial drilled.

In thc'spccifi'o embodiment of my invention illustrated in the drawings, I accomplish this by means of a friction device comprising a friction member 101 operative-1y, mounted on the feed cylinder 7 and engaging tl'ic i'ccd piston rod 6. The gri'ppin effect may bc controllcd'by a bolt 103 pm crably cooperating with amanually controllable and nut serving in the illustrative embodiment us means for increasing, decreasing or eliminating altogctlzcr the tension of the frictional piston gri Jping means.

While the bcforc mentioned control is of marked udvantugc in, any construction of rotating, pressure fluid fed drill, itis ofiparticular imjiortwicc in a drill of the type 'tcns'ioning and udiusting nut 104, the bolt i illustrated wherein the, rotation of the drill,

, pressure feed isof v allel exes.' The drill bit 2 is pre 'ener aforesaid hammer piston actuated rotation is What I elaim as miniiention and desire 46 used, will result in correspondin geretardajtqfsecure by Letters .latent is set iorth in tion and short stroking of the piston, the

being expanded in exerting pressure to-turn. the ratchet member 10 (the details of construction of which arefullyidesoribed in Patent N 0.. 1,034,010v before mentioned).

vEvenwhen used inconnection with a rotating mechanism actuated independently of hammer re'oiprocatiomthe control of the at importance for efliciency of the drill-as a wholeis greatly im airedby improper functioning of the dri 1 steel rotating apparatus.

I preferthat the drilling engine. 1- be so mounted that itlnay-swing awa froni the dij ll ed aperture so i that" the dril steehjmay; be: readily changed. utilizing my feeding I prefer thatv the piston- 6 berotatableiin the cylinder 7 and that thepiston rod and alined, with the vVd 'ii .lill g.i.eng ne. Thus" h h dr ng ng e isxs ung ahonttthe pivot-itwfllalways remain. parallel with the drilled aperture. To hold the drillingengine in any desired lateral positionwhilechanging drill steels or when-spotting holes, I may use any suitable means, but I prefer .to use the friction 101 by tightening the nut 104:. This, by restrain in relative rotation of the piston 6 and eylin er" 7 will sition about the ,axis pf the feed mechanism.

,cifie embodiment of my invention for illus+ hold the drilling engine in any desired fpo,

While I have 'shown and deseribedone spe amem er" fixed relativeto saideylinder',

ber eperati'vl der and said vidingj pivot means 'w incler mayJbeu svmt'i'gletv longitudinal axisto} 'm'ovethe sameout of alinement with theqdrillaperture, and fries tibli-f means" oontroljlingiq'said longitudinal mechanism as a "'bination, a

ably...

the following claims-:5 g 'lJDrillin apparatus comprising, in eoin- 011 t e sidesof. the rifled slot 11 in trying bination,.,a rill-cylinder, feedingmeans ineludf', amember fixed relative to he wor fi '60" ressure fluid actuated] means "for produox membertwh'ereby s'al'd drillacylinderlmny a'dvan ed relative'tb thefwork; mofiset mems5 I onnecting}. sa d drill -eylin-.

ceding-m .'diP r P ,saidrdr ll cylfe es to. its

d g nov'ement and swinging moveapparatus comprising, in com i. r

In testimony whereof, lihavessign j.:name.to this specification, in the presence-of traf-ive purposes, it is to be'understood tha-t. vtwo subscribing witnesses,

my invention is not limited to the. specific extensive} deviations .from the ,il jl 'gtrative I jmattenmay be made without departing from theprincipleof myinyention GEORGE HQGILMAN,

' Witnesses:

LEE A.- KNIGHTS, CHARLFs H. TIZPPING.

v I l l ill cylinder,-feeding means in 1 the dri-llingengine have substantiall par eluding a member fixed relativeto thework,

fir a member fixed relative to saideyhn'cler, and V pressire fluidactuated meansjfortp iqduc- I ingflongituclinal JQ'Qdi Ig movement-of the second member-whereby said drill cylinder may be advanced relative to the work, an offset member operatively connecting said drill cylinderandsaid feeding means, "said parts providing pivot means whereby said rdrillgeylinder may be swungat right angles toits-longitudinal axis to move they-sameoutof 'alinement with the drilled aperture, and friction means controlling said, swinging movement. 

